Who has been buying Hirakawa Hewtech Corp. stock?

14 distinct investors have filed 29 disclosed large-shareholding filings in Hirakawa Hewtech Corp. (5821), most recently on 2026-04-07. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does Hirakawa Hewtech Corp. have?

Hirakawa Hewtech Corp. has 29 buy-side and 18 sell-side disclosures on record, covering ¥5.0B ($32.5M) in total reported value, spanning 2021-04-07 to 2026-04-07.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Hirakawa Hewtech Corp. 5821

Company

平河ヒューテック株式会社Hirakawa Hewtech Corp.

Investors

Buys

Total Value

¥5.0B ($32.5M)

Avg Return

+220.97%

Last Filing

2026-04-07

Hirakawa Hewtech Corp. (5821) has 29 disclosed large-shareholding filings and 18 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥5.0B ($32.5M) in reported transaction value. The earliest filing StockDrifts holds for Hirakawa Hewtech Corp. is dated 2021-04-07; the most recent is 2026-04-07. Across these filings the average return since disclosure is +220.97%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-07-28	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	1.6M	¥2,991	+6.8%	¥190M ($1.2M)
2026-06-05	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	1.5M	¥4,050	-21.1%	¥350M ($2.3M)
2026-05-22	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	1.4M	¥3,620	-11.7%	¥83M ($535K)
2026-05-22	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	1.4M	¥3,620	-	¥306M ($2.0M)
2026-04-07	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	passive	1.4M	¥3,900	-18.1%	¥1.5B ($9.4M)
2026-04-07	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	passive	1.4M	¥3,900	-	¥1.2B ($7.8M)
2026-01-09	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	passive	1.0M	¥2,834	+12.7%	¥200M ($1.3M)
2025-10-22	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	passive	972.7K	¥2,212	+44.4%	¥2.2B ($13.9M)
2025-06-30	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	161.4K	¥1,377	+132.0%	¥15M ($94K)
2025-06-30	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	5.6K	¥1,377	+132.0%	¥646M ($4.2M)
2025-06-30	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	613.0K	¥1,377	-132.0%	¥255M ($1.6M)
2025-06-30	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	94.5K	¥1,377	+132.0%	¥728M ($4.7M)
2025-04-02	BUY	unknown	隅田和夫 Kazuo Sumida	other	550.4K	¥1,308	+144.3%	¥720M ($4.6M)
2025-04-02	BUY	unknown	隅田文子 Fumiko Sumida	strategic	349.8K	¥1,308	+144.3%	¥458M ($3.0M)
2025-03-07	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	130.3K	¥1,397.14	-128.7%	¥411M ($2.7M)
2025-03-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	600.0K	¥1,397.14	-	-
2025-03-07	SELL	unknown	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	7.6K	¥1,397.14	-128.7%	¥64M ($413K)
2025-02-03	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	60.6K	¥1,465.71	-	¥89M ($573K)
2025-02-03	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	90.0K	¥1,465.71	-	-
2025-02-03	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	798.3K	¥1,465.71	+118.0%	¥199M ($1.3M)
2025-02-03	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	152.3K	¥1,465.71	-	-
2024-09-02	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	152.0K	¥1,363.81	+134.3%	¥207M ($1.3M)
2024-09-02	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	90.0K	¥1,363.81	+134.3%	¥123M ($792K)
2024-09-02	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	662.9K	¥1,363.81	+134.3%	¥904M ($5.8M)
2024-04-22	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	53.4K	¥1,251.43	-155.3%	¥113M ($726K)
2024-04-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	600.0K	¥1,251.43	-	-
2024-04-22	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	424.1K	¥1,251.43	-155.3%	¥115M ($740K)
2024-03-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	600.0K	¥1,269.52	-	-
2024-03-07	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	142.2K	¥1,269.52	-151.7%	¥264M ($1.7M)
2024-03-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	515.7K	¥1,269.52	+151.7%	¥184M ($1.2M)
2023-04-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	600.0K	¥1,318.09	+142.4%	¥791M ($5.1M)
2023-04-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	77.6K	¥1,318.09	+142.4%	¥102M ($660K)
2023-04-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	214.9K	¥1,318.09	+142.4%	¥283M ($1.8M)
2023-01-20	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	371.7K	¥1,067.62	+199.3%	¥224M ($1.4M)
2023-01-20	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	600.0K	¥1,067.62	-	-
2023-01-20	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	350.5K	¥1,067.62	-	-
2022-04-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	600.0K	¥1,035.24	-	-
2022-04-22	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	unknown	0	¥1,035.24	-208.6%	¥42M ($271K)
2022-04-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	238.4K	¥1,035.24	-208.6%	¥146M ($942K)
2022-04-18	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	135.5K	¥1,031.43	+209.8%	¥2M ($12K)
2022-04-18	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	90.0K	¥1,031.43	-	-
2022-04-18	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	534.7K	¥1,031.43	+209.8%	¥40M ($258K)
2022-04-18	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	19.0K	¥1,031.43	-209.8%	¥267M ($1.7M)
2022-04-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	600.0K	¥1,048.57	-	-
2022-04-07	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	161.6K	¥1,048.57	-204.7%	¥351M ($2.3M)
2022-04-07	SELL	unknown	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	350.9K	¥1,048.57	-204.7%	¥20M ($131K)
2022-03-22	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	495.6K	¥1,090.48	+193.0%	¥4M ($25K)
2022-03-22	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	90.0K	¥1,090.48	-	-
2022-03-22	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	134.6K	¥1,090.48	-	-
2022-03-22	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	278.9K	¥1,090.48	+193.0%	¥21M ($136K)

Showing the 50 most recent of 70 filings.

Frequently asked questions

Who has been buying Hirakawa Hewtech Corp. stock?: 14 distinct investors have filed 29 disclosed large-shareholding filings in Hirakawa Hewtech Corp. (5821), most recently on 2026-04-07. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Hirakawa Hewtech Corp. have?: Hirakawa Hewtech Corp. has 29 buy-side and 18 sell-side disclosures on record, covering ¥5.0B ($32.5M) in total reported value, spanning 2021-04-07 to 2026-04-07.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.